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Relation of submarine landslide to hydrate occurrences in Baiyun Depression, South China Sea
Sun, Yunbao1,2; Zhang, Xiaohua3; Wu, Shiguo4,5,6; Wang, Lei1; Yang, Shengxiong7; Sun, Yunbao(Qingdao Natl Lab Marine Sci & Technol, Evaluat & Detect Technol Lab Marine Mineral Resou, Qingdao 266003, Peoples R China)
2018-02-01
Source PublicationJOURNAL OF OCEAN UNIVERSITY OF CHINA
Volume17Issue:1Pages:129-138
Contribution Rank第1完成单位 ; 第2完成单位 ; 第3完成单位 ; 第4完成单位 ; 第5完成单位 ; 第6完成单位 ; 第7完成单位
AbstractSubmarine landslides have been observed in the Baiyun Depression of the South China Sea. The occurrence of hydrates below these landslides indicates that these slope instabilities may be closely related to the massive release of methane. In this study, we used a simple Monte-Carlo model to determine the first-order deformation pattern of a gravitationally destabilizing slope. The results show that a stress concentration occurs due to hydrate dissociation on the nearby glide surface and on top of a gas chimney structure. Upon the dissolution of the gas hydrate, slope failure occurs due to the excess pore pressure generated by the dissociation of the gas hydrates. When gas hydrates dissociate at shallow depths, the excess pore pressure generated can be greater than the total stress acting at those points, along with the forces that resist sliding. Initially, the failure occurs at the toe of the slope, then extends to the interior. Although our investigation focused only on the contribution of hydrate decomposition to submarine landslide, this process is also affected by both the slope material properties and topography.
SubtypeArticle
KeywordHydrate Canyon Submarine Slide South China Sea
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11802-018-3458-1
URL查看原文
Indexed BySCI
Language英语
WOS KeywordNORTHERN CONTINENTAL-SLOPE ; GULF-OF-MEXICO ; GAS-HYDRATE ; SHENHU AREA ; SEISMIC DATA ; OFFSHORE MAURITANIA ; STOREGGA SLIDE ; ITALIAN ALPS ; MARGIN ; CANYON
WOS SubjectOceanography
WOS IDWOS:000419533800013
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/5262
Collection深海科学研究部_深海地球物理与资源研究室
Corresponding AuthorSun, Yunbao
Affiliation1.Qingdao Natl Lab Marine Sci & Technol, Evaluat & Detect Technol Lab Marine Mineral Resou, Qingdao 266003, Peoples R China
2.Qingdao Inst Marine Geol, Gas Hydrate Geol Div, Qingdao 266071, Peoples R China
3.Ocean Univ China, Coll Marine Geosci, Qingao 266100, Peoples R China
4.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Lab Marine Geophys & Georesources, Sanya 572000, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China
6.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
7.MLR, Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Sun, Yunbao,Zhang, Xiaohua,Wu, Shiguo,et al. Relation of submarine landslide to hydrate occurrences in Baiyun Depression, South China Sea[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2018,17(1):129-138.
APA Sun, Yunbao,Zhang, Xiaohua,Wu, Shiguo,Wang, Lei,Yang, Shengxiong,&Sun, Yunbao.(2018).Relation of submarine landslide to hydrate occurrences in Baiyun Depression, South China Sea.JOURNAL OF OCEAN UNIVERSITY OF CHINA,17(1),129-138.
MLA Sun, Yunbao,et al."Relation of submarine landslide to hydrate occurrences in Baiyun Depression, South China Sea".JOURNAL OF OCEAN UNIVERSITY OF CHINA 17.1(2018):129-138.
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